<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<script>
		let arr = [22,33,99];
		// let result = arr.map(item=>item*2)
		// console.log(result);  //[44,66,88]
		
		let result = arr.map(item=>item>=60?"及格":"不及格");
		console.log(result);  // ["不及格", "不及格", "及格"]
		</script>
	</head>
	<body>
	</body>
</html>
